VBoxNetFlt-darwin.cpp revision b341bcbb341f01cceb1767c9e45fb6ecf161a46e
de4157257515400c2c25373591135f110227b68cvboxsync * VBoxNetFlt - Network Filter Driver (Host), Darwin Specific Code.
e64031e20c39650a7bc902a3e1aba613b9415deevboxsync * Copyright (C) 2006-2012 Oracle Corporation
b263fac6f6e7fa933c7bfb2a45d598fe8e458c09vboxsync * This file is part of VirtualBox Open Source Edition (OSE), as
b263fac6f6e7fa933c7bfb2a45d598fe8e458c09vboxsync * available from http://www.virtualbox.org. This file is free software;
b263fac6f6e7fa933c7bfb2a45d598fe8e458c09vboxsync * you can redistribute it and/or modify it under the terms of the GNU
b263fac6f6e7fa933c7bfb2a45d598fe8e458c09vboxsync * General Public License (GPL) as published by the Free Software
b263fac6f6e7fa933c7bfb2a45d598fe8e458c09vboxsync * Foundation, in version 2 as it comes in the "COPYING" file of the
b263fac6f6e7fa933c7bfb2a45d598fe8e458c09vboxsync * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
b263fac6f6e7fa933c7bfb2a45d598fe8e458c09vboxsync * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
de4157257515400c2c25373591135f110227b68cvboxsync/*******************************************************************************
de4157257515400c2c25373591135f110227b68cvboxsync* Header Files *
de4157257515400c2c25373591135f110227b68cvboxsync*******************************************************************************/
de4157257515400c2c25373591135f110227b68cvboxsync * Deal with conflicts first.
de4157257515400c2c25373591135f110227b68cvboxsync * PVM - BSD mess, that FreeBSD has correct a long time ago.
de4157257515400c2c25373591135f110227b68cvboxsync * iprt/types.h before sys/param.h - prevents UINT32_C and friends.
de4157257515400c2c25373591135f110227b68cvboxsync#include "../../darwin/VBoxNetSend.h"
590bfe12ce22cd3716448fbb9f4dc51664bfe5e2vboxsyncRT_C_DECLS_BEGIN /* Buggy 10.4 headers, fixed in 10.5. */
de4157257515400c2c25373591135f110227b68cvboxsync/*******************************************************************************
de4157257515400c2c25373591135f110227b68cvboxsync* Defined Constants And Macros *
de4157257515400c2c25373591135f110227b68cvboxsync*******************************************************************************/
de4157257515400c2c25373591135f110227b68cvboxsync/** The maximum number of SG segments.
de4157257515400c2c25373591135f110227b68cvboxsync * Used to prevent stack overflow and similar bad stuff. */
de4157257515400c2c25373591135f110227b68cvboxsync/** For testing extremely segmented frames. */
590bfe12ce22cd3716448fbb9f4dc51664bfe5e2vboxsync/*******************************************************************************
de4157257515400c2c25373591135f110227b68cvboxsync* Internal Functions *
de4157257515400c2c25373591135f110227b68cvboxsync*******************************************************************************/
de4157257515400c2c25373591135f110227b68cvboxsyncstatic kern_return_t VBoxNetFltDarwinStart(struct kmod_info *pKModInfo, void *pvData);
de4157257515400c2c25373591135f110227b68cvboxsyncstatic kern_return_t VBoxNetFltDarwinStop(struct kmod_info *pKModInfo, void *pvData);
de4157257515400c2c25373591135f110227b68cvboxsync/*******************************************************************************
de4157257515400c2c25373591135f110227b68cvboxsync* Structures and Typedefs *
de4157257515400c2c25373591135f110227b68cvboxsync*******************************************************************************/
de4157257515400c2c25373591135f110227b68cvboxsync * The mbuf tag data.
ad27e1d5e48ca41245120c331cc88b50464813cevboxsync * We have to associate the ethernet header with each packet we're sending
de4157257515400c2c25373591135f110227b68cvboxsync * because things like icmp will inherit the tag it self so the tag along
de4157257515400c2c25373591135f110227b68cvboxsync * isn't sufficient to identify our mbufs. For the icmp scenario the ethernet
de4157257515400c2c25373591135f110227b68cvboxsync * header naturally changes before the packet is send pack, so let check it.
de4157257515400c2c25373591135f110227b68cvboxsync /** The ethernet header of the outgoing frame. */
de4157257515400c2c25373591135f110227b68cvboxsync/** Pointer to a VBoxNetFlt mbuf tag. */
de4157257515400c2c25373591135f110227b68cvboxsync/** Pointer to a const VBoxNetFlt mbuf tag. */
de4157257515400c2c25373591135f110227b68cvboxsync/*******************************************************************************
de4157257515400c2c25373591135f110227b68cvboxsync* Global Variables *
de4157257515400c2c25373591135f110227b68cvboxsync*******************************************************************************/
de4157257515400c2c25373591135f110227b68cvboxsync * Declare the module stuff.
de4157257515400c2c25373591135f110227b68cvboxsyncextern kern_return_t _start(struct kmod_info *pKModInfo, void *pvData);
de4157257515400c2c25373591135f110227b68cvboxsyncextern kern_return_t _stop(struct kmod_info *pKModInfo, void *pvData);
de4157257515400c2c25373591135f110227b68cvboxsyncKMOD_EXPLICIT_DECL(VBoxNetFlt, VBOX_VERSION_STRING, _start, _stop)
590bfe12ce22cd3716448fbb9f4dc51664bfe5e2vboxsyncDECLHIDDEN(kmod_start_func_t *) _realmain = VBoxNetFltDarwinStart;
de4157257515400c2c25373591135f110227b68cvboxsyncDECLHIDDEN(kmod_stop_func_t *) _antimain = VBoxNetFltDarwinStop;
de4157257515400c2c25373591135f110227b68cvboxsync * The (common) global data.
de4157257515400c2c25373591135f110227b68cvboxsync/** The unique tag id for this module.
de4157257515400c2c25373591135f110227b68cvboxsync * This is basically a unique string hash that lives on until reboot.
de4157257515400c2c25373591135f110227b68cvboxsync * It is used for tagging mbufs. */
de4157257515400c2c25373591135f110227b68cvboxsync/** the offset of the struct ifnet::if_pcount variable (valid for Lion). */
de4157257515400c2c25373591135f110227b68cvboxsyncstatic unsigned g_offIfNetPCount = sizeof(void *) * (1 /*if_softc*/ + 1 /*if_name*/ + 2 /*if_link*/ + 2 /*if_addrhead*/ + 1 /*if_check_multi*/)
de4157257515400c2c25373591135f110227b68cvboxsync/** Macro for accessing ifnet::if_pcount. */
de4157257515400c2c25373591135f110227b68cvboxsync#define VBOX_GET_PCOUNT(pIfNet) ( *(int *)((uintptr_t)pIfNet + g_offIfNetPCount) )
de4157257515400c2c25373591135f110227b68cvboxsync/** The size of area of ifnet structure we try to locate if_pcount in. */
de4157257515400c2c25373591135f110227b68cvboxsync * Note that this implementation relies on if_pcount to be aligned on sizeof(int).
de4157257515400c2c25373591135f110227b68cvboxsyncstatic unsigned vboxNetFltDarwinSetAndDiff(ifnet_t pIfNet, int iPromisc)
de4157257515400c2c25373591135f110227b68cvboxsync unsigned i;
de4157257515400c2c25373591135f110227b68cvboxsync int aSavedState[VBOXNETFLT_DARWIN_IFNET_SIZE/sizeof(int)];
de4157257515400c2c25373591135f110227b68cvboxsync * We assume that ifnet structure will never have less members in front of if_pcount
de4157257515400c2c25373591135f110227b68cvboxsync * than it used to have in Lion. If this turns out to be false assumption we will
de4157257515400c2c25373591135f110227b68cvboxsync * have to start from zero offset.
de4157257515400c2c25373591135f110227b68cvboxsync for (i = g_offIfNetPCount / sizeof(int); i < sizeof(aSavedState) / sizeof(int); i++)
de4157257515400c2c25373591135f110227b68cvboxsync offset = i * sizeof(int);
de4157257515400c2c25373591135f110227b68cvboxsync * Detect and adjust the offset of ifnet::if_pcount.
de4157257515400c2c25373591135f110227b68cvboxsyncstatic void vboxNetFltDarwinDetectPCountOffset(ifnet_t pIfNet)
de4157257515400c2c25373591135f110227b68cvboxsync * It would be nice to use locking at this point, but it is not available via KPI.
de4157257515400c2c25373591135f110227b68cvboxsync * This is why we try several times. At each attempt we modify if_pcount four times
de4157257515400c2c25373591135f110227b68cvboxsync * to rule out false detections.
de4157257515400c2c25373591135f110227b68cvboxsync for (int nAttempts = 0; nAttempts < 3; nAttempts++)
de4157257515400c2c25373591135f110227b68cvboxsync /* If any attempt has failed we won't continue as our algorithm is flawed. */
de4157257515400c2c25373591135f110227b68cvboxsync if (offTry1 == offTry2 && offTry2 == offTry3 && offTry3 == offTry4)
de4157257515400c2c25373591135f110227b68cvboxsync Log(("VBoxNetFltDarwinDetectPCountOffset: Adjusted if_pcount offset to %x from %x.\n", offTry1, g_offIfNetPCount));
de4157257515400c2c25373591135f110227b68cvboxsync LogRel(("VBoxNetFlt: Failed to detect promiscuous count, all traffic may reach wire (%x != %x).\n", g_offIfNetPCount, offTry1));
de4157257515400c2c25373591135f110227b68cvboxsync * Start the kernel module.
de4157257515400c2c25373591135f110227b68cvboxsyncstatic kern_return_t VBoxNetFltDarwinStart(struct kmod_info *pKModInfo, void *pvData)
de4157257515400c2c25373591135f110227b68cvboxsync * Initialize IPRT and find our module tag id.
de4157257515400c2c25373591135f110227b68cvboxsync * (IPRT is shared with VBoxDrv, it creates the loggers.)
de4157257515400c2c25373591135f110227b68cvboxsync errno_t err = mbuf_tag_id_find("org.VirtualBox.kext.VBoxFltDrv", &g_idTag);
de4157257515400c2c25373591135f110227b68cvboxsync * Initialize the globals and connect to the support driver.
de4157257515400c2c25373591135f110227b68cvboxsync * This will call back vboxNetFltOsOpenSupDrv (and maybe vboxNetFltOsCloseSupDrv)
d61e6f5b11d9031623420bd7ed3013477d8f402dvboxsync * for establishing the connect to the support driver.
de4157257515400c2c25373591135f110227b68cvboxsync memset(&g_VBoxNetFltGlobals, 0, sizeof(g_VBoxNetFltGlobals));
c7ff622115966b69b482bd2896662e40d823b22fvboxsync rc = vboxNetFltInitGlobalsAndIdc(&g_VBoxNetFltGlobals);
de4157257515400c2c25373591135f110227b68cvboxsync LogRel(("VBoxFltDrv: version " VBOX_VERSION_STRING " r%d\n", VBOX_SVN_REV));
de4157257515400c2c25373591135f110227b68cvboxsync LogRel(("VBoxFltDrv: failed to initialize device extension (rc=%d)\n", rc));
de4157257515400c2c25373591135f110227b68cvboxsync LogRel(("VBoxFltDrv: mbuf_tag_id_find failed, err=%d\n", err));
de4157257515400c2c25373591135f110227b68cvboxsync printf("VBoxFltDrv: failed to initialize IPRT (rc=%d)\n", rc);
de4157257515400c2c25373591135f110227b68cvboxsync memset(&g_VBoxNetFltGlobals, 0, sizeof(g_VBoxNetFltGlobals));
de4157257515400c2c25373591135f110227b68cvboxsync * Stop the kernel module.
de4157257515400c2c25373591135f110227b68cvboxsyncstatic kern_return_t VBoxNetFltDarwinStop(struct kmod_info *pKModInfo, void *pvData)
de4157257515400c2c25373591135f110227b68cvboxsync * Refuse to unload if anyone is currently using the filter driver.
de4157257515400c2c25373591135f110227b68cvboxsync * This is important as I/O kit / xnu will to be able to do usage
de4157257515400c2c25373591135f110227b68cvboxsync * tracking for us!
de4157257515400c2c25373591135f110227b68cvboxsync int rc = vboxNetFltTryDeleteIdcAndGlobals(&g_VBoxNetFltGlobals);
de4157257515400c2c25373591135f110227b68cvboxsync * Undo the work done during start (in reverse order).
de4157257515400c2c25373591135f110227b68cvboxsync memset(&g_VBoxNetFltGlobals, 0, sizeof(g_VBoxNetFltGlobals));
de4157257515400c2c25373591135f110227b68cvboxsync * Reads and retains the host interface handle.
de4157257515400c2c25373591135f110227b68cvboxsync * @returns The handle, NULL if detached.
de4157257515400c2c25373591135f110227b68cvboxsync * @param pThis
de4157257515400c2c25373591135f110227b68cvboxsyncDECLINLINE(ifnet_t) vboxNetFltDarwinRetainIfNet(PVBOXNETFLTINS pThis)
de4157257515400c2c25373591135f110227b68cvboxsync * Be careful here to avoid problems racing the detached callback.
de4157257515400c2c25373591135f110227b68cvboxsync if (!ASMAtomicUoReadBool(&pThis->fDisconnectedFromHost))
de4157257515400c2c25373591135f110227b68cvboxsync pIfNet = ASMAtomicUoReadPtrT(&pThis->u.s.pIfNet, ifnet_t);
de4157257515400c2c25373591135f110227b68cvboxsync * Release the host interface handle previously retained
de4157257515400c2c25373591135f110227b68cvboxsync * by vboxNetFltDarwinRetainIfNet.
de4157257515400c2c25373591135f110227b68cvboxsync * @param pThis The instance.
de4157257515400c2c25373591135f110227b68cvboxsync * @param pIfNet The vboxNetFltDarwinRetainIfNet return value, NULL is fine.
de4157257515400c2c25373591135f110227b68cvboxsyncDECLINLINE(void) vboxNetFltDarwinReleaseIfNet(PVBOXNETFLTINS pThis, ifnet_t pIfNet)
de4157257515400c2c25373591135f110227b68cvboxsync * Checks whether this is an mbuf created by vboxNetFltDarwinMBufFromSG,
de4157257515400c2c25373591135f110227b68cvboxsync * i.e. a buffer which we're pushing and should be ignored by the filter callbacks.
de4157257515400c2c25373591135f110227b68cvboxsync * @returns true / false accordingly.
de4157257515400c2c25373591135f110227b68cvboxsync * @param pThis The instance.
de4157257515400c2c25373591135f110227b68cvboxsync * @param pMBuf The mbuf.
de4157257515400c2c25373591135f110227b68cvboxsync * @param pvFrame The frame pointer, optional.
de4157257515400c2c25373591135f110227b68cvboxsyncDECLINLINE(bool) vboxNetFltDarwinMBufIsOur(PVBOXNETFLTINS pThis, mbuf_t pMBuf, void *pvFrame)
de4157257515400c2c25373591135f110227b68cvboxsync * Lookup the tag set by vboxNetFltDarwinMBufFromSG.
de4157257515400c2c25373591135f110227b68cvboxsync errno_t err = mbuf_tag_find(pMBuf, g_idTag, 0 /* type */, &cbTagData, (void **)&pTagData);
de4157257515400c2c25373591135f110227b68cvboxsync return false;
de4157257515400c2c25373591135f110227b68cvboxsync AssertReturn(cbTagData == sizeof(*pTagData), false);
bc1484a141a5638d1c26739e77e8a47c77dc2da3vboxsync * Dig out the ethernet header from the mbuf.
bc1484a141a5638d1c26739e77e8a47c77dc2da3vboxsync PCRTNETETHERHDR pEthHdr = (PCRTNETETHERHDR)pvFrame;
de4157257515400c2c25373591135f110227b68cvboxsync pEthHdr = (PCRTNETETHERHDR)mbuf_pkthdr_header(pMBuf);
de4157257515400c2c25373591135f110227b68cvboxsync /* ASSUMING that there is enough data to work on! */
de4157257515400c2c25373591135f110227b68cvboxsync if ( pEthHdr->DstMac.au8[0] != pTagData->EthHdr.DstMac.au8[0]
de4157257515400c2c25373591135f110227b68cvboxsync || pEthHdr->DstMac.au8[1] != pTagData->EthHdr.DstMac.au8[1]
de4157257515400c2c25373591135f110227b68cvboxsync || pEthHdr->DstMac.au8[2] != pTagData->EthHdr.DstMac.au8[2]
de4157257515400c2c25373591135f110227b68cvboxsync || pEthHdr->DstMac.au8[3] != pTagData->EthHdr.DstMac.au8[3]
de4157257515400c2c25373591135f110227b68cvboxsync || pEthHdr->DstMac.au8[4] != pTagData->EthHdr.DstMac.au8[4]
de4157257515400c2c25373591135f110227b68cvboxsync || pEthHdr->DstMac.au8[5] != pTagData->EthHdr.DstMac.au8[5]
de4157257515400c2c25373591135f110227b68cvboxsync || pEthHdr->SrcMac.au8[0] != pTagData->EthHdr.SrcMac.au8[0]
de4157257515400c2c25373591135f110227b68cvboxsync || pEthHdr->SrcMac.au8[1] != pTagData->EthHdr.SrcMac.au8[1]
de4157257515400c2c25373591135f110227b68cvboxsync || pEthHdr->SrcMac.au8[2] != pTagData->EthHdr.SrcMac.au8[2]
de4157257515400c2c25373591135f110227b68cvboxsync || pEthHdr->SrcMac.au8[3] != pTagData->EthHdr.SrcMac.au8[3]
de4157257515400c2c25373591135f110227b68cvboxsync || pEthHdr->SrcMac.au8[4] != pTagData->EthHdr.SrcMac.au8[4]
de4157257515400c2c25373591135f110227b68cvboxsync || pEthHdr->SrcMac.au8[5] != pTagData->EthHdr.SrcMac.au8[5]
de4157257515400c2c25373591135f110227b68cvboxsync || pEthHdr->EtherType != pTagData->EthHdr.EtherType)
de4157257515400c2c25373591135f110227b68cvboxsync Log3(("tagged, but the ethernet header has changed\n"));
de4157257515400c2c25373591135f110227b68cvboxsync return false;
de4157257515400c2c25373591135f110227b68cvboxsync return true;
108e1eed4a717344ddcec74bcae3ea793fda4724vboxsync * Internal worker that create a darwin mbuf for a (scatter/)gather list.
de4157257515400c2c25373591135f110227b68cvboxsync * @returns Pointer to the mbuf.
108e1eed4a717344ddcec74bcae3ea793fda4724vboxsync * @param pThis The instance.
108e1eed4a717344ddcec74bcae3ea793fda4724vboxsync * @param pSG The (scatter/)gather list.
9127c416edfd6f9266e387f7abd7aa9904eecbc9vboxsyncstatic mbuf_t vboxNetFltDarwinMBufFromSG(PVBOXNETFLTINS pThis, PINTNETSG pSG)
de4157257515400c2c25373591135f110227b68cvboxsync /// @todo future? mbuf_how_t How = preemption enabled ? MBUF_DONTWAIT : MBUF_WAITOK;
de4157257515400c2c25373591135f110227b68cvboxsync * We need some way of getting back to our instance data when
5564cd8c0930563b66d9ebcf709a31ad75bfe709vboxsync * the mbuf is freed, so use pvUserData for this.
de4157257515400c2c25373591135f110227b68cvboxsync * -- this is not relevant anylonger! --
de4157257515400c2c25373591135f110227b68cvboxsync Assert(!pSG->pvUserData || pSG->pvUserData == pThis);
de4157257515400c2c25373591135f110227b68cvboxsync * Allocate a packet and copy over the data.
de4157257515400c2c25373591135f110227b68cvboxsync * Using mbuf_attachcluster() here would've been nice but there are two
de4157257515400c2c25373591135f110227b68cvboxsync * issues with it: (1) it's 10.5.x only, and (2) the documentation indicates
de4157257515400c2c25373591135f110227b68cvboxsync * that it's not supposed to be used for really external buffers. The 2nd
de4157257515400c2c25373591135f110227b68cvboxsync * point might be argued against considering that the only m_clattach user
de4157257515400c2c25373591135f110227b68cvboxsync * is mallocs memory for the ext mbuf and not doing what's stated in the docs.
de4157257515400c2c25373591135f110227b68cvboxsync * However, it's hard to tell if these m_clattach buffers actually makes it
de4157257515400c2c25373591135f110227b68cvboxsync * to the NICs or not, and even if they did, the NIC would need the physical
de4157257515400c2c25373591135f110227b68cvboxsync * addresses for the pages they contain and might end up copying the data
de4157257515400c2c25373591135f110227b68cvboxsync * to a new mbuf anyway.
de4157257515400c2c25373591135f110227b68cvboxsync * So, in the end it's better to just do it the simple way that will work
de4157257515400c2c25373591135f110227b68cvboxsync * 100%, even if it involves some extra work (alloc + copy) we really wished
de4157257515400c2c25373591135f110227b68cvboxsync * to avoid.
de4157257515400c2c25373591135f110227b68cvboxsync * Note. We can't make use of the physical addresses on darwin because the
de4157257515400c2c25373591135f110227b68cvboxsync * way the mbuf / cluster stuff works (see mbuf_data_to_physical and
de4157257515400c2c25373591135f110227b68cvboxsync * mcl_to_paddr).
de4157257515400c2c25373591135f110227b68cvboxsync errno_t err = mbuf_allocpacket(How, pSG->cbTotal, NULL, &pPkt);
de4157257515400c2c25373591135f110227b68cvboxsync /* Skip zero sized memory buffers (paranoia). */
de4157257515400c2c25373591135f110227b68cvboxsync /* Set the required packet header attributes. */
de4157257515400c2c25373591135f110227b68cvboxsync /* Special case the single buffer copy. */
de4157257515400c2c25373591135f110227b68cvboxsync /* Multi buffer copying. */
de4157257515400c2c25373591135f110227b68cvboxsync /* advance */
de4157257515400c2c25373591135f110227b68cvboxsync * Tag the packet and return successfully.
de4157257515400c2c25373591135f110227b68cvboxsync err = mbuf_tag_allocate(pPkt, g_idTag, 0 /* type */, sizeof(VBOXNETFLTTAG) /* tag len */, How, (void **)&pTagData);
de4157257515400c2c25373591135f110227b68cvboxsync Assert(pSG->aSegs[0].cb >= sizeof(pTagData->EthHdr));
de4157257515400c2c25373591135f110227b68cvboxsync memcpy(&pTagData->EthHdr, pSG->aSegs[0].pv, sizeof(pTagData->EthHdr));
de4157257515400c2c25373591135f110227b68cvboxsync /* bailout: */
de4157257515400c2c25373591135f110227b68cvboxsync AssertMsg(err == ENOMEM || err == EWOULDBLOCK, ("err=%d\n", err));
6dd8f5023a9ba7588212331db90059553136fe33vboxsync AssertMsg(err == ENOMEM || err == EWOULDBLOCK, ("err=%d\n", err));
de4157257515400c2c25373591135f110227b68cvboxsync * Calculates the number of segments required to represent the mbuf.
de4157257515400c2c25373591135f110227b68cvboxsync * @returns Number of segments.
de4157257515400c2c25373591135f110227b68cvboxsync * @param pThis The instance.
de4157257515400c2c25373591135f110227b68cvboxsync * @param pMBuf The mbuf.
de4157257515400c2c25373591135f110227b68cvboxsync * @param pvFrame The frame pointer, optional.
de4157257515400c2c25373591135f110227b68cvboxsyncDECLINLINE(unsigned) vboxNetFltDarwinMBufCalcSGSegs(PVBOXNETFLTINS pThis, mbuf_t pMBuf, void *pvFrame)
de4157257515400c2c25373591135f110227b68cvboxsync * Count the buffers in the chain.
de4157257515400c2c25373591135f110227b68cvboxsync unsigned cSegs = 0;
de4157257515400c2c25373591135f110227b68cvboxsync for (mbuf_t pCur = pMBuf; pCur; pCur = mbuf_next(pCur))
de4157257515400c2c25373591135f110227b68cvboxsync && (uintptr_t)pvFrame - (uintptr_t)mbuf_datastart(pMBuf) < mbuf_maxlen(pMBuf))
de4157257515400c2c25373591135f110227b68cvboxsync * Add one buffer if the total is less than the ethernet minimum 60 bytes.
de4157257515400c2c25373591135f110227b68cvboxsync * This may allocate a segment too much if the ethernet header is separated,
de4157257515400c2c25373591135f110227b68cvboxsync * but that shouldn't harm us much.
de4157257515400c2c25373591135f110227b68cvboxsync /* maximize the number of segments. */
de4157257515400c2c25373591135f110227b68cvboxsync cSegs = RT_MAX(VBOXNETFLT_DARWIN_MAX_SEGS - 1, cSegs);
de4157257515400c2c25373591135f110227b68cvboxsync * Initializes a SG list from an mbuf.
de4157257515400c2c25373591135f110227b68cvboxsync * @returns Number of segments.
de4157257515400c2c25373591135f110227b68cvboxsync * @param pThis The instance.
de4157257515400c2c25373591135f110227b68cvboxsync * @param pMBuf The mbuf.
de4157257515400c2c25373591135f110227b68cvboxsync * @param pSG The SG.
de4157257515400c2c25373591135f110227b68cvboxsync * @param pvFrame The frame pointer, optional.
de4157257515400c2c25373591135f110227b68cvboxsync * @param cSegs The number of segments allocated for the SG.
de4157257515400c2c25373591135f110227b68cvboxsync * This should match the number in the mbuf exactly!
de4157257515400c2c25373591135f110227b68cvboxsync * @param fSrc The source of the frame.
de4157257515400c2c25373591135f110227b68cvboxsyncDECLINLINE(void) vboxNetFltDarwinMBufToSG(PVBOXNETFLTINS pThis, mbuf_t pMBuf, void *pvFrame, PINTNETSG pSG, unsigned cSegs, uint32_t fSrc)
de4157257515400c2c25373591135f110227b68cvboxsync * Walk the chain and convert the buffers to segments. Works INTNETSG::cbTotal.
de4157257515400c2c25373591135f110227b68cvboxsync unsigned iSeg = 0;
de4157257515400c2c25373591135f110227b68cvboxsync IntNetSgInitTempSegs(pSG, 0 /*cbTotal*/, cSegs, 0 /*cSegsUsed*/);
de4157257515400c2c25373591135f110227b68cvboxsync for (mbuf_t pCur = pMBuf; pCur; pCur = mbuf_next(pCur))
de4157257515400c2c25373591135f110227b68cvboxsync /* deal with pvFrame */
de4157257515400c2c25373591135f110227b68cvboxsync uintptr_t offSeg = (uintptr_t)pvSeg - (uintptr_t)pvStart;
de4157257515400c2c25373591135f110227b68cvboxsync Assert(pvStart && pvSeg && offSeg < mbuf_maxlen(pMBuf) && offSegEnd <= mbuf_maxlen(pMBuf)); NOREF(offSegEnd);
de4157257515400c2c25373591135f110227b68cvboxsync uintptr_t offFrame = (uintptr_t)pvFrame - (uintptr_t)pvStart;
de4157257515400c2c25373591135f110227b68cvboxsync AssertMsgFailed(("pvFrame=%p pvStart=%p pvSeg=%p offSeg=%p cbSeg=%#zx offSegEnd=%p offFrame=%p maxlen=%#zx\n",
de4157257515400c2c25373591135f110227b68cvboxsync pvFrame, pvStart, pvSeg, offSeg, cbSeg, offSegEnd, offFrame, mbuf_maxlen(pMBuf)));
de4157257515400c2c25373591135f110227b68cvboxsync /* The pvFrame might be in a now empty buffer. */
de4157257515400c2c25373591135f110227b68cvboxsync && (uintptr_t)pvFrame - (uintptr_t)mbuf_datastart(pMBuf) < mbuf_maxlen(pMBuf))
de4157257515400c2c25373591135f110227b68cvboxsync cbSeg = (uintptr_t)mbuf_datastart(pMBuf) + mbuf_maxlen(pMBuf) - (uintptr_t)pvFrame;
5f809eed9fe4d8f7f317e8102657eb877fd5fbdavboxsync * Add a trailer if the frame is too small.
5f809eed9fe4d8f7f317e8102657eb877fd5fbdavboxsync * Since we're getting to the packet before it is framed, it has not
5f809eed9fe4d8f7f317e8102657eb877fd5fbdavboxsync * yet been padded. The current solution is to add a segment pointing
5f809eed9fe4d8f7f317e8102657eb877fd5fbdavboxsync * to a buffer containing all zeros and pray that works for all frames...
5f809eed9fe4d8f7f317e8102657eb877fd5fbdavboxsync if (pSG->cbTotal < 60 && (fSrc & INTNETTRUNKDIR_HOST))
5f809eed9fe4d8f7f317e8102657eb877fd5fbdavboxsync * Redistribute the segments.
de4157257515400c2c25373591135f110227b68cvboxsync /* copy the segments to the end. */
de4157257515400c2c25373591135f110227b68cvboxsync while (iSrc > 0)
de4157257515400c2c25373591135f110227b68cvboxsync /* create small segments from the start. */
de4157257515400c2c25373591135f110227b68cvboxsync pSG->aSegs[iDst].cb = RT_MIN(pSG->aSegs[iSrc].cb, VBOXNETFLT_DARWIN_TEST_SEG_SIZE);
d61e6f5b11d9031623420bd7ed3013477d8f402dvboxsync pSG->aSegs[iSrc].pv = (uint8_t *)pSG->aSegs[iSrc].pv + pSG->aSegs[iDst].cb;
de4157257515400c2c25373591135f110227b68cvboxsync AssertMsg(!pvFrame, ("pvFrame=%p pMBuf=%p iSeg=%d\n", pvFrame, pMBuf, iSeg));
de4157257515400c2c25373591135f110227b68cvboxsync * Helper for determining whether the host wants the interface to be
de4157257515400c2c25373591135f110227b68cvboxsync * promiscuous.
de4157257515400c2c25373591135f110227b68cvboxsyncstatic bool vboxNetFltDarwinIsPromiscuous(PVBOXNETFLTINS pThis)
de4157257515400c2c25373591135f110227b68cvboxsync bool fRc = false;
de4157257515400c2c25373591135f110227b68cvboxsync ifnet_t pIfNet = vboxNetFltDarwinRetainIfNet(pThis);
de4157257515400c2c25373591135f110227b68cvboxsync /* gather the data */
de4157257515400c2c25373591135f110227b68cvboxsync bool fSetPromiscuous = ASMAtomicUoReadBool(&pThis->u.s.fSetPromiscuous);
de4157257515400c2c25373591135f110227b68cvboxsync /* calc the return. */
de4157257515400c2c25373591135f110227b68cvboxsync * @see iff_detached_func in the darwin kpi.
de4157257515400c2c25373591135f110227b68cvboxsyncstatic void vboxNetFltDarwinIffDetached(void *pvThis, ifnet_t pIfNet)
de4157257515400c2c25373591135f110227b68cvboxsync LogFlow(("vboxNetFltDarwinIffDetached: pThis=%p NanoTS=%RU64 (%d)\n",
de4157257515400c2c25373591135f110227b68cvboxsync pThis, NanoTS, VALID_PTR(pIfNet) ? VBOX_GET_PCOUNT(pIfNet) : -1));
de4157257515400c2c25373591135f110227b68cvboxsync * If we've put it into promiscuous mode, undo that now. If we don't
de4157257515400c2c25373591135f110227b68cvboxsync * the if_pcount will go all wrong when it's replugged.
de4157257515400c2c25373591135f110227b68cvboxsync if (ASMAtomicXchgBool(&pThis->u.s.fSetPromiscuous, false))
de4157257515400c2c25373591135f110227b68cvboxsync * We carefully take the spinlock and increase the interface reference
de4157257515400c2c25373591135f110227b68cvboxsync * behind it in order to avoid problematic races with the detached callback.
de4157257515400c2c25373591135f110227b68cvboxsync pIfNet = ASMAtomicUoReadPtrT(&pThis->u.s.pIfNet, ifnet_t);
de4157257515400c2c25373591135f110227b68cvboxsync int cPromisc = VALID_PTR(pIfNet) ? VBOX_GET_PCOUNT(pIfNet) : - 1;
de4157257515400c2c25373591135f110227b68cvboxsync ASMAtomicWriteBool(&pThis->u.s.fNeedSetPromiscuous, false);
de4157257515400c2c25373591135f110227b68cvboxsync ASMAtomicUoWriteU64(&pThis->NanoTSLastRediscovery, NanoTS);
de4157257515400c2c25373591135f110227b68cvboxsync ASMAtomicUoWriteBool(&pThis->fRediscoveryPending, false);
de4157257515400c2c25373591135f110227b68cvboxsync ASMAtomicWriteBool(&pThis->fDisconnectedFromHost, true);
de4157257515400c2c25373591135f110227b68cvboxsync LogRel(("VBoxNetFlt: was detached from '%s' (%d)\n", pThis->szName, cPromisc));
de4157257515400c2c25373591135f110227b68cvboxsync * @see iff_ioctl_func in the darwin kpi.
de4157257515400c2c25373591135f110227b68cvboxsyncstatic errno_t vboxNetFltDarwinIffIoCtl(void *pvThis, ifnet_t pIfNet, protocol_family_t eProtocol, u_long uCmd, void *pvArg)
de4157257515400c2c25373591135f110227b68cvboxsync LogFlow(("vboxNetFltDarwinIffIoCtl: pThis=%p uCmd=%lx\n", pThis, uCmd));
de4157257515400c2c25373591135f110227b68cvboxsync * Update fOtherPromiscuous.
de4157257515400c2c25373591135f110227b68cvboxsync /** @todo we'll have to find the offset of if_pcount to get this right! */
de4157257515400c2c25373591135f110227b68cvboxsync //if (uCmd == SIOCSIFFLAGS)
de4157257515400c2c25373591135f110227b68cvboxsync * We didn't handle it, continue processing.
de4157257515400c2c25373591135f110227b68cvboxsync * @see iff_event_func in the darwin kpi.
de4157257515400c2c25373591135f110227b68cvboxsyncstatic void vboxNetFltDarwinIffEvent(void *pvThis, ifnet_t pIfNet, protocol_family_t eProtocol, const struct kev_msg *pEvMsg)
de4157257515400c2c25373591135f110227b68cvboxsync LogFlow(("vboxNetFltDarwinIffEvent: pThis=%p\n", pThis));
de4157257515400c2c25373591135f110227b68cvboxsync * Watch out for the interface going online / offline.
de4157257515400c2c25373591135f110227b68cvboxsync if (ASMAtomicUoReadBool(&pThis->u.s.fNeedSetPromiscuous))
de4157257515400c2c25373591135f110227b68cvboxsync /* failed to bring it online. */
de4157257515400c2c25373591135f110227b68cvboxsync ASMAtomicWriteBool(&pThis->u.s.fSetPromiscuous, true);
de4157257515400c2c25373591135f110227b68cvboxsync ASMAtomicWriteBool(&pThis->u.s.fNeedSetPromiscuous, false);
de4157257515400c2c25373591135f110227b68cvboxsync Log(("vboxNetFltDarwinIffEvent: enabled promiscuous mode on %s (%d)\n", pThis->szName, VBOX_GET_PCOUNT(pIfNet)));
de4157257515400c2c25373591135f110227b68cvboxsync Log(("vboxNetFltDarwinIffEvent: ifnet_set_promiscuous failed on %s, err=%d (%d)\n", pThis->szName, err, VBOX_GET_PCOUNT(pIfNet)));
de4157257515400c2c25373591135f110227b68cvboxsync else if ( ASMAtomicUoReadBool(&pThis->u.s.fSetPromiscuous)
de4157257515400c2c25373591135f110227b68cvboxsync /* Try fix the inconsistency. */
de4157257515400c2c25373591135f110227b68cvboxsync errno_t err = ifnet_set_flags(pIfNet, IFF_PROMISC, IFF_PROMISC);
de4157257515400c2c25373591135f110227b68cvboxsync Log(("vboxNetFltDarwinIffEvent: fixed IFF_PROMISC on %s (%d)\n", pThis->szName, VBOX_GET_PCOUNT(pIfNet)));
de4157257515400c2c25373591135f110227b68cvboxsync Log(("vboxNetFltDarwinIffEvent: failed to fix IFF_PROMISC on %s, err=%d flags=%#x (%d)\n",
de4157257515400c2c25373591135f110227b68cvboxsync pThis->szName, err, ifnet_flags(pIfNet), VBOX_GET_PCOUNT(pIfNet)));
de4157257515400c2c25373591135f110227b68cvboxsync Log(("vboxNetFltDarwinIffEvent: online, '%s'. flags=%#x (%d)\n", pThis->szName, ifnet_flags(pIfNet), VBOX_GET_PCOUNT(pIfNet)));
de4157257515400c2c25373591135f110227b68cvboxsync Log(("vboxNetFltDarwinIffEvent: %s goes down (%d)\n", pThis->szName, VBOX_GET_PCOUNT(pIfNet)));
de4157257515400c2c25373591135f110227b68cvboxsync/** @todo KEV_DL_LINK_ADDRESS_CHANGED -> pfnReportMacAddress */
de4157257515400c2c25373591135f110227b68cvboxsync/** @todo KEV_DL_SIFFLAGS -> pfnReportPromiscuousMode */
de4157257515400c2c25373591135f110227b68cvboxsync Log(("vboxNetFltDarwinIffEvent: pThis->u.s.pIfNet=%p pIfNet=%p (%d)\n", pThis->u.s.pIfNet, pIfNet, VALID_PTR(pIfNet) ? VBOX_GET_PCOUNT(pIfNet) : -1));
de4157257515400c2c25373591135f110227b68cvboxsync Log(("vboxNetFltDarwinIffEvent: vendor_code=%#x kev_class=%#x kev_subclass=%#x event_code=%#x\n",
22f8a6ac3bcf3e3c8aa1f275097d6f7ce392195bvboxsync pEvMsg->vendor_code, pEvMsg->kev_class, pEvMsg->kev_subclass, pEvMsg->event_code));
22f8a6ac3bcf3e3c8aa1f275097d6f7ce392195bvboxsync * Internal worker for vboxNetFltDarwinIffInput and vboxNetFltDarwinIffOutput,
22f8a6ac3bcf3e3c8aa1f275097d6f7ce392195bvboxsync * @returns 0 or EJUSTRETURN.
22f8a6ac3bcf3e3c8aa1f275097d6f7ce392195bvboxsync * @param pThis The instance.
22f8a6ac3bcf3e3c8aa1f275097d6f7ce392195bvboxsync * @param pMBuf The mbuf.
22f8a6ac3bcf3e3c8aa1f275097d6f7ce392195bvboxsync * @param pvFrame The start of the frame, optional.
22f8a6ac3bcf3e3c8aa1f275097d6f7ce392195bvboxsync * @param fSrc Where the packet (allegedly) comes from, one INTNETTRUNKDIR_* value.
22f8a6ac3bcf3e3c8aa1f275097d6f7ce392195bvboxsync * @param eProtocol The protocol.
de4157257515400c2c25373591135f110227b68cvboxsyncstatic errno_t vboxNetFltDarwinIffInputOutputWorker(PVBOXNETFLTINS pThis, mbuf_t pMBuf, void *pvFrame,
de4157257515400c2c25373591135f110227b68cvboxsync * Drop it immediately?
de4157257515400c2c25373591135f110227b68cvboxsync Log2(("vboxNetFltDarwinIffInputOutputWorker: pThis=%p pMBuf=%p pvFrame=%p fSrc=%#x cbPkt=%x\n",
de4157257515400c2c25373591135f110227b68cvboxsync pThis, pMBuf, pvFrame, fSrc, pMBuf ? mbuf_pkthdr_len(pMBuf) : -1));
de4157257515400c2c25373591135f110227b68cvboxsync#if 0 /* debugging lost icmp packets */
de4157257515400c2c25373591135f110227b68cvboxsync uint8_t *pb = (uint8_t *)(pvFrame ? pvFrame : mbuf_data(pMBuf));
de4157257515400c2c25373591135f110227b68cvboxsync Log3(("D=%.6Rhxs S=%.6Rhxs T=%04x IFF\n", pb, pb + 6, RT_BE2H_U16(*(uint16_t *)(pb + 12))));
22f8a6ac3bcf3e3c8aa1f275097d6f7ce392195bvboxsync if (vboxNetFltDarwinMBufIsOur(pThis, pMBuf, pvFrame))
de4157257515400c2c25373591135f110227b68cvboxsync * Active? Retain the instance and increment the busy counter.
de4157257515400c2c25373591135f110227b68cvboxsync * Finalize out-bound packets since the stack puts off finalizing
de4157257515400c2c25373591135f110227b68cvboxsync * TCP/IP checksums as long as possible.
22f8a6ac3bcf3e3c8aa1f275097d6f7ce392195bvboxsync * ASSUMES this only applies to outbound IP packets.
de4157257515400c2c25373591135f110227b68cvboxsync mbuf_outbound_finalize(pMBuf, eProtocol, sizeof(RTNETETHERHDR));
de4157257515400c2c25373591135f110227b68cvboxsync * Create a (scatter/)gather list for the mbuf and feed it to the internal network.
de4157257515400c2c25373591135f110227b68cvboxsync bool fDropIt = false;
de4157257515400c2c25373591135f110227b68cvboxsync unsigned cSegs = vboxNetFltDarwinMBufCalcSGSegs(pThis, pMBuf, pvFrame);
de4157257515400c2c25373591135f110227b68cvboxsync PINTNETSG pSG = (PINTNETSG)alloca(RT_OFFSETOF(INTNETSG, aSegs[cSegs]));
de4157257515400c2c25373591135f110227b68cvboxsync vboxNetFltDarwinMBufToSG(pThis, pMBuf, pvFrame, pSG, cSegs, fSrc);
de4157257515400c2c25373591135f110227b68cvboxsync fDropIt = pThis->pSwitchPort->pfnRecv(pThis->pSwitchPort, NULL /* pvIf */, pSG, fSrc);
de4157257515400c2c25373591135f110227b68cvboxsync * Check if this interface is in promiscuous mode. We should not drop
de4157257515400c2c25373591135f110227b68cvboxsync * any packets before they get to the driver as it passes them to tap
de4157257515400c2c25373591135f110227b68cvboxsync * callbacks in order for BPF to work properly.
de4157257515400c2c25373591135f110227b68cvboxsync * From the host.
5f809eed9fe4d8f7f317e8102657eb877fd5fbdavboxsync * @see iff_output_func in the darwin kpi.
de4157257515400c2c25373591135f110227b68cvboxsyncstatic errno_t vboxNetFltDarwinIffOutput(void *pvThis, ifnet_t pIfNet, protocol_family_t eProtocol, mbuf_t *ppMBuf)
de4157257515400c2c25373591135f110227b68cvboxsync /** @todo there was some note about the ethernet header here or something like that... */
de4157257515400c2c25373591135f110227b68cvboxsync return vboxNetFltDarwinIffInputOutputWorker((PVBOXNETFLTINS)pvThis, *ppMBuf, NULL, INTNETTRUNKDIR_HOST, eProtocol);
de4157257515400c2c25373591135f110227b68cvboxsync * From the wire.
de4157257515400c2c25373591135f110227b68cvboxsync * @see iff_input_func in the darwin kpi.
de4157257515400c2c25373591135f110227b68cvboxsyncstatic errno_t vboxNetFltDarwinIffInput(void *pvThis, ifnet_t pIfNet, protocol_family_t eProtocol, mbuf_t *ppMBuf, char **ppchFrame)
de4157257515400c2c25373591135f110227b68cvboxsync return vboxNetFltDarwinIffInputOutputWorker((PVBOXNETFLTINS)pvThis, *ppMBuf, *ppchFrame, INTNETTRUNKDIR_WIRE, eProtocol);
de4157257515400c2c25373591135f110227b68cvboxsync/** A worker thread for vboxNetFltSendDummy(). */
de4157257515400c2c25373591135f110227b68cvboxsyncstatic DECLCALLBACK(int) vboxNetFltSendDummyWorker(RTTHREAD hThreadSelf, void *pvUser)
5f809eed9fe4d8f7f317e8102657eb877fd5fbdavboxsync * Prevent GUI icon freeze issue when VirtualBoxVM process terminates.
e594418ef5afa60279edfc12b2c3ac8763701585vboxsync * This function is a workaround for stuck-in-dock issue. The idea here is to
d61e6f5b11d9031623420bd7ed3013477d8f402dvboxsync * send a dummy packet to an interface from the context of a kernel thread.
5f809eed9fe4d8f7f317e8102657eb877fd5fbdavboxsync * Therefore, an XNU's receive thread (which is created as a result if we are
de4157257515400c2c25373591135f110227b68cvboxsync * the first who is communicating with the interface) will be associated with
de4157257515400c2c25373591135f110227b68cvboxsync * the kernel thread instead of VirtualBoxVM process.
de4157257515400c2c25373591135f110227b68cvboxsync * @param pIfNet Interface to be used to send data.
5f809eed9fe4d8f7f317e8102657eb877fd5fbdavboxsync int rc = RTThreadCreate(&hThread, vboxNetFltSendDummyWorker, (void *)pIfNet, 0,
de4157257515400c2c25373591135f110227b68cvboxsync RTTHREADTYPE_DEFAULT, RTTHREADFLAGS_WAITABLE, "DummyThread");
de4157257515400c2c25373591135f110227b68cvboxsync LogFlow(("vboxNetFltSendDummy: a dummy packet has been successfully sent in order to prevent stuck-in-dock issue\n"));
de4157257515400c2c25373591135f110227b68cvboxsync LogFlow(("vboxNetFltSendDummy: unable to send dummy packet in order to prevent stuck-in-dock issue\n"));
de4157257515400c2c25373591135f110227b68cvboxsync * Internal worker for vboxNetFltOsInitInstance and vboxNetFltOsMaybeRediscovered.
de4157257515400c2c25373591135f110227b68cvboxsync * @returns VBox status code.
586cf6585d0e6aa3bef888eeff116bf82d18cd83vboxsync * @param pThis The instance.
586cf6585d0e6aa3bef888eeff116bf82d18cd83vboxsync * @param fRediscovery If set we're doing a rediscovery attempt, so, don't
de4157257515400c2c25373591135f110227b68cvboxsync * flood the release log.
de4157257515400c2c25373591135f110227b68cvboxsyncstatic int vboxNetFltDarwinAttachToInterface(PVBOXNETFLTINS pThis, bool fRediscovery)
de4157257515400c2c25373591135f110227b68cvboxsync LogFlow(("vboxNetFltDarwinAttachToInterface: pThis=%p (%s)\n", pThis, pThis->szName));
de4157257515400c2c25373591135f110227b68cvboxsync * Locate the interface first.
de4157257515400c2c25373591135f110227b68cvboxsync * The pIfNet member is updated before iflt_attach is called and used
de4157257515400c2c25373591135f110227b68cvboxsync * to deal with the hypothetical case where someone rips out the
de4157257515400c2c25373591135f110227b68cvboxsync * interface immediately after our iflt_attach call.
de4157257515400c2c25373591135f110227b68cvboxsync errno_t err = ifnet_find_by_name(pThis->szName, &pIfNet);
de4157257515400c2c25373591135f110227b68cvboxsync LogRel(("VBoxFltDrv: failed to find ifnet '%s' (err=%d)\n", pThis->szName, err));
de4157257515400c2c25373591135f110227b68cvboxsync Log(("VBoxFltDrv: failed to find ifnet '%s' (err=%d)\n", pThis->szName, err));
de4157257515400c2c25373591135f110227b68cvboxsync /* Adjust g_offIfNetPCount as it varies for different versions of xnu. */
de4157257515400c2c25373591135f110227b68cvboxsync /* Prevent stuck-in-dock issue by associating interface receive thread with kernel thread. */
de4157257515400c2c25373591135f110227b68cvboxsync * Get the mac address while we still have a valid ifnet reference.
de4157257515400c2c25373591135f110227b68cvboxsync err = ifnet_lladdr_copy_bytes(pIfNet, &pThis->u.s.MacAddr, sizeof(pThis->u.s.MacAddr));
de4157257515400c2c25373591135f110227b68cvboxsync * Try attach the filter.
b3e99f2211c081f3d92cc7649f1dc50317bccc0fvboxsync pIfNet = ASMAtomicUoReadPtrT(&pThis->u.s.pIfNet, ifnet_t);
fa0eb85ad87e090d4fa2890b5c51d01d26c1aaf3vboxsync ASMAtomicUoWriteBool(&pThis->fDisconnectedFromHost, false);
fa0eb85ad87e090d4fa2890b5c51d01d26c1aaf3vboxsync ASMAtomicUoWritePtr(&pThis->u.s.pIfFilter, pIfFilter);
fa0eb85ad87e090d4fa2890b5c51d01d26c1aaf3vboxsync /* Report capabilities. */
de4157257515400c2c25373591135f110227b68cvboxsync pThis->pSwitchPort->pfnReportMacAddress(pThis->pSwitchPort, &pThis->u.s.MacAddr);
de4157257515400c2c25373591135f110227b68cvboxsync pThis->pSwitchPort->pfnReportPromiscuousMode(pThis->pSwitchPort, vboxNetFltDarwinIsPromiscuous(pThis));
b3e99f2211c081f3d92cc7649f1dc50317bccc0fvboxsync pThis->pSwitchPort->pfnReportGsoCapabilities(pThis->pSwitchPort, 0, INTNETTRUNKDIR_WIRE | INTNETTRUNKDIR_HOST);
b3e99f2211c081f3d92cc7649f1dc50317bccc0fvboxsync pThis->pSwitchPort->pfnReportNoPreemptDsts(pThis->pSwitchPort, 0 /* none */);
b3e99f2211c081f3d92cc7649f1dc50317bccc0fvboxsync /* Release the interface on failure. */
de4157257515400c2c25373591135f110227b68cvboxsync LogRel(("VBoxFltDrv: attached to '%s' / %.*Rhxs\n", pThis->szName, sizeof(pThis->u.s.MacAddr), &pThis->u.s.MacAddr));
b3e99f2211c081f3d92cc7649f1dc50317bccc0fvboxsync LogRel(("VBoxFltDrv: failed to attach to ifnet '%s' (err=%d)\n", pThis->szName, err));
b3e99f2211c081f3d92cc7649f1dc50317bccc0fvboxsyncbool vboxNetFltOsMaybeRediscovered(PVBOXNETFLTINS pThis)
b3e99f2211c081f3d92cc7649f1dc50317bccc0fvboxsync vboxNetFltDarwinAttachToInterface(pThis, true /* fRediscovery */);
b3e99f2211c081f3d92cc7649f1dc50317bccc0fvboxsync return !ASMAtomicUoReadBool(&pThis->fDisconnectedFromHost);
b3e99f2211c081f3d92cc7649f1dc50317bccc0fvboxsyncint vboxNetFltPortOsXmit(PVBOXNETFLTINS pThis, void *pvIfData, PINTNETSG pSG, uint32_t fDst)
b3e99f2211c081f3d92cc7649f1dc50317bccc0fvboxsync ifnet_t pIfNet = vboxNetFltDarwinRetainIfNet(pThis);
de4157257515400c2c25373591135f110227b68cvboxsync * Create a mbuf for the gather list and push it onto the wire.
b3e99f2211c081f3d92cc7649f1dc50317bccc0fvboxsync * Note! If the interface is in the promiscuous mode we need to send the
b3e99f2211c081f3d92cc7649f1dc50317bccc0fvboxsync * packet down the stack so it reaches the driver and Berkeley
b3e99f2211c081f3d92cc7649f1dc50317bccc0fvboxsync * Packet Filter (see @bugref{5817}).
b3e99f2211c081f3d92cc7649f1dc50317bccc0fvboxsync if ((fDst & INTNETTRUNKDIR_WIRE) || vboxNetFltDarwinIsPromiscuous(pThis))
b3e99f2211c081f3d92cc7649f1dc50317bccc0fvboxsync mbuf_t pMBuf = vboxNetFltDarwinMBufFromSG(pThis, pSG);
b3e99f2211c081f3d92cc7649f1dc50317bccc0fvboxsync errno_t err = ifnet_output_raw(pIfNet, PF_LINK, pMBuf);
b3e99f2211c081f3d92cc7649f1dc50317bccc0fvboxsync * Create a mbuf for the gather list and push it onto the host stack.
b3e99f2211c081f3d92cc7649f1dc50317bccc0fvboxsync mbuf_t pMBuf = vboxNetFltDarwinMBufFromSG(pThis, pSG);
b3e99f2211c081f3d92cc7649f1dc50317bccc0fvboxsync /* This is what IONetworkInterface::inputPacket does. */
b3e99f2211c081f3d92cc7649f1dc50317bccc0fvboxsync mbuf_pkthdr_setlen(pMBuf, mbuf_pkthdr_len(pMBuf) - cbEthHdr);
b3e99f2211c081f3d92cc7649f1dc50317bccc0fvboxsync mbuf_setdata(pMBuf, (uint8_t *)mbuf_data(pMBuf) + cbEthHdr, mbuf_len(pMBuf) - cbEthHdr);
b3e99f2211c081f3d92cc7649f1dc50317bccc0fvboxsync mbuf_pkthdr_setrcvif(pMBuf, pIfNet); /* will crash without this. */
de4157257515400c2c25373591135f110227b68cvboxsyncvoid vboxNetFltPortOsSetActive(PVBOXNETFLTINS pThis, bool fActive)
de4157257515400c2c25373591135f110227b68cvboxsync ifnet_t pIfNet = vboxNetFltDarwinRetainIfNet(pThis);
de4157257515400c2c25373591135f110227b68cvboxsync * Promiscuous mode should not be used (wireless), we just need to
de4157257515400c2c25373591135f110227b68cvboxsync * make sure the interface is up.
de4157257515400c2c25373591135f110227b68cvboxsync if ((fIf & (IFF_UP | IFF_RUNNING)) != (IFF_UP | IFF_RUNNING))
de4157257515400c2c25373591135f110227b68cvboxsync * This api is a bit weird, the best reference is the code.
de4157257515400c2c25373591135f110227b68cvboxsync * Also, we have a bit or race conditions wrt the maintenance of
de4157257515400c2c25373591135f110227b68cvboxsync * host the interface promiscuity for vboxNetFltPortOsIsPromiscuous.
de4157257515400c2c25373591135f110227b68cvboxsync unsigned const cPromiscBefore = VBOX_GET_PCOUNT(pIfNet);
de4157257515400c2c25373591135f110227b68cvboxsync ASMAtomicWriteBool(&pThis->u.s.fNeedSetPromiscuous, true);
de4157257515400c2c25373591135f110227b68cvboxsync * Try bring the interface up and running if it's down.
de4157257515400c2c25373591135f110227b68cvboxsync if ((fIf & (IFF_UP | IFF_RUNNING)) != (IFF_UP | IFF_RUNNING))
5f809eed9fe4d8f7f317e8102657eb877fd5fbdavboxsync errno_t err2 = ifnet_ioctl(pIfNet, 0, SIOCSIFFLAGS, NULL);
69c51855f3b700d7b26a81f1d7dfed523097b7e2vboxsync * Is it already up? If it isn't, leave it to the link event or
586cf6585d0e6aa3bef888eeff116bf82d18cd83vboxsync * we'll upset if_pcount (as stated above, ifnet_set_promiscuous is weird).
69c51855f3b700d7b26a81f1d7dfed523097b7e2vboxsync if ((fIf & (IFF_UP | IFF_RUNNING)) == (IFF_UP | IFF_RUNNING))
69c51855f3b700d7b26a81f1d7dfed523097b7e2vboxsync ASMAtomicWriteBool(&pThis->u.s.fNeedSetPromiscuous, false);
69c51855f3b700d7b26a81f1d7dfed523097b7e2vboxsync /* check if it actually worked, this stuff is not always behaving well. */
69c51855f3b700d7b26a81f1d7dfed523097b7e2vboxsync err = ifnet_set_flags(pIfNet, IFF_PROMISC, IFF_PROMISC);
69c51855f3b700d7b26a81f1d7dfed523097b7e2vboxsync Log(("vboxNetFlt: fixed IFF_PROMISC on %s (%d->%d)\n", pThis->szName, cPromiscBefore, VBOX_GET_PCOUNT(pIfNet)));
Log(("VBoxNetFlt: ifnet_set_promiscuous -> err=%d grr! (%d->%d)\n", err, cPromiscBefore, VBOX_GET_PCOUNT(pIfNet)));
else if (!err)
Log(("VBoxNetFlt: Waiting for the link to come up... (%d->%d)\n", cPromiscBefore, VBOX_GET_PCOUNT(pIfNet)));
if (err)
LogRel(("VBoxNetFlt: Failed to put '%s' into promiscuous mode, err=%d (%d->%d)\n", pThis->szName, err, cPromiscBefore, VBOX_GET_PCOUNT(pIfNet)));
return VINF_SUCCESS;
return VINF_SUCCESS;
if (pIfFilter)
if (pIfFilter)
//pThis->u.s.MacAddr = {0};
return VINF_SUCCESS;
return VINF_SUCCESS;
return VINF_SUCCESS;